Travelling to Kaunas by car is hassle-free from Riga, Warsaw, Vilnius, Klaipėda and pretty much the rest of the cities in the surrounding region.
You have to pay for parking in the central part of Kaunas every day from 8 am to 8 pm and in the Townhall square - from 8 am till midnight. You can find payment methods for parking here: https://parkavimaskaune.lt/en/paid-parking-areas/atsiskaitymo-uz-stovejima-budai/
IMPORTANT, parking procedures and prices may change, follow the information at www.parkavimaskaune.lt/en and watch the road signs.
Photo. A. Aleksandravičius